Revenue from contracts with customers (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

Revenue Disaggregated by Reportable Segment and Type of Service

(In millions)	Core Services		High-Value Services	Other Security Services	Total
Three months ended March 31, 2020
Reportable Segments:
North America	$	274.2	170.1	—	444.3
South America	100.4		93.8	3.7	197.9
Rest of World	82.0		117.9	30.7	230.6
Total reportable segments	456.6		381.8	34.4	872.8
Three months ended March 31, 2019
Reportable Segments:
North America	$	277.2	157.3	—	434.5
South America	119.2		108.1	3.0	230.3
Rest of World	88.0		119.3	32.9	240.2
Total reportable segments	484.4		384.7	35.9	905.0

Contract with Customer, Asset and Liability

The opening and closing balances of receivables, contract assets and contract liabilities related to contracts with customers are as follows:

(In millions)	Receivables		Contract Asset	Contract Liability
Opening (January 1, 2020)	$	635.6	1.9	12.8
Closing (March 31, 2020)	643.3		1.9	14.5
Increase (decrease)	$	7.7	—	1.7